You need to buy a membership at a store. For example toys r us.
You can't really get a free membership on Lego Universe, however you can sign up for free and become a non-member from the Lego Universe site.
Go onto the Lego universe website and there is an option for free play made. All you need is a free lego account and you're all set!
You have to have an account on LEGO.com to be able to sign up for Beta testing, which leads to downloading LEGO universe.
Yes, you have to be a member to access Ninjago items/worlds etc.
First of all become a member (not a free account), then see the Ninja in Advent Gardens.
No
Yes,yes ya do 
no you can't you have to be a member
You need to buy it.
no you can only go there if your a member but you can still have fun!
well first you need to be a Lego club or Lego brickmaster member. Then, you go to the Lego universe home and click the button that says type in code. You type in your membership # on the back of your magazine and hit yes. next go to nimbus station and then the portal is somewhere there. find info at Lego universe home or the nov-dec issue of Lego club magazine
You will have to download Lego universe if you have access to it.